问题 单项选择题

一定的经济发展水平,只能支持一定数量和质量的人口,因而物质资料的生产和人口增长必须协调发展。人作为生产者、消费者,t其数量和质量必须与生产资料的质与量、消费品 的结构与数量,以及资金的数量与投资结构等相适应。由上可以推出

A.目前中国人口数量与其经济发展水平已不相适应

B.人既是生产者,又是消费者,但生产出的价值远大于消费掉的

C.提高了人的数量和质量,经济就会发展

D.当人的增长数量超过经济发展水平时,人的消费质量就会下降

答案

参考答案:D

解析:由于甲药比乙药有效,而乙药又与己药药效相同,所以甲药比己药药效好,答案为D.

单项选择题
单项选择题

For more than a decade, the prevailing view of innovation has been that little guys had the edge. Innovation bubbled up from the bottom, from upstarts and insurgents. Big companies didn’t innovate, and government got in the way. In the dominant innovation narrative, venture-backed start-up companies were cast as the nimble winners and large corporations as the sluggish losers.

There was a rich vein of business-school research supporting the notion that innovation comes most naturally from small-scale outsiders. That was the headline point that a generation of business people, venture investors and policy makers took away from Clayton M. Christensen’s 1997 classic, The Innovator’s Dilemma, which examined the process of disruptive change.

But a shift in thinking is under way, driven by altered circumstances. In the United States and abroad, the biggest economic and social challenges—and potential business opportunities—are problems in multifaceted fields like the environment, energy and health care that rely on complex systems.

Solutions won’t come from the next new gadget or clever software, though such innovations will help. Instead, they must plug into a larger network of change shaped by economics, regulation and policy. Progress, experts say, will depend on people in a wide range of disciplines, and collaboration across the public and private sectors.

"These days, more than ever, size matters in the innovation game," said John Kao, a former professor at the Harvard business school and an innovation consultant to governments and corporations. In its economic recovery package, the Obama administration is financing programs to generate innovation with technology in health care and energy. The government will spend billions to accelerate the adoption of electronic patient records to help improve care and curb costs, and billions more to spur the installation of so-called smart grids that use sensors and computerized meters to reduce electricity consumption.

In other developed nations, where energy costs are higher than in the United States, government and corporate projects to cut fuel use and reduce carbon emissions are further along. But the Obama administration is pushing environmental and energy conservation policy more in the direction of Europe and Japan. The change will bolster demand for more efficient and more environmentally friendly systems for managing commuter traffic, food distribution, electric grids and waterways.

These systems are animated by inexpensive sensors and ever-increasing computing power but also require the skills to analyze, model and optimize complex networks, factoring in things as diverse as weather patterns and human behavior. Big companies like General Electric and IBM that employ scientists in many disciplines typically have the skills and scale to tackle such projects.

In his book Christensen comes to the conclusion that()

A. business people are more innovative than government officials

B. all kinds of changes are disruptive activities in some sense

C. the dilemma of any innovation is its disruptive nature

D. small businesses are more creative than large companies